Question about 2002 Audi A4

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Battery light keeps coming on as i drive i have replaced the battery and the light glows bright the minute i go near or over 3000rpms my headlights start going bright and dim and the car feels like it loses power

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Possible problem with the voltage regulator. Call an Audi dealer and ask if that's a separate part or if it's built into the alternator. If it's separate, you could replace just the regulator. If not, you'd have to get the alternator.

Another outside chance is that the load reduction relay in the car is getting screwy, and that may need replacement.

Posted on Aug 01, 2008

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My bright lights keep jumping on in the middle of the night. Is there a fuse for the bright lights


If the lights are coming on, WHY would you be looking for a fuse??? If the fuse is blown, the lights ill not work at all!

When you say "the middle of the night" are you saying that hey are coming on when the car is turned off and nobody is near it? or are you saying that they are switching to bright when you are driving?

Please review the following articles and get back with me.

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SOMETHING KEEPS DRAINING MY BATTERY,CHANGED ALTERNATOR STILL BATTERY GETTING DRAINED


HI. Here is a procedure I use to isolate a battery drain. Remove the negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, this will indicate a large drain is present. That should be corrected,asap. Now start removing and replacing the fuses one by one until the light goes out; The one fuse that causes the light to shut off, will be the circuit with the drain. Remember to close the car doors, when testing. If not, the interior doom light will interfere with the results of the test.

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1 Answer

Battery has been replaced twice once last year and again 3 weeks ago. I am still having battery problem. Whatcould be the problem as the mechanic can't seem to find the problem. Thanks.


Try this: turn everything in the car off--that means everything, all accessories, lights, etc. Remove all items in cigarette lighter sockets or power ports. Key off, car as dead as you can make it. Then take the negative battery terminal clamp off the negative post. Hook up a 12v test light between the terminal clamp and the post. If the light glows brightly, you have a parasitic drain going on which is slowly draining your battery down. The light may glow dimly to power the clock and some computer memory and that's okay. But a bright glow means a short. Now, with the lamp glowing brightly, start pulling fuses one at a time until the light goes out. The short is on one of the circuits of the last fuse pulled.

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Hi I have trouble in the battery of my 2001 toyota vitz,the problem is when ever I connect the battery the rear break light glows and never goes off even if I start the engine and start driving and also...


No there is a brake switch to turn on the brake lights when you step on the brake pedal. It is located near the rake pedal under the dash. It has more then likely failed.

Jul 23, 2010 | 2001 Toyota Echo

1 Answer

Battery is draining


Here is the procedure I use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.

Oct 17, 2009 | 2000 Mitsubishi Galant

1 Answer

Slow electical drain resulting in dead battery if not run frequently to recharge.


Here is the procedure I use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.

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2 Answers

2005 Dodge Caravan with Dead Battery. Replaced and new battery died. Took it in for service. Alternator checked out ok and Drain was within tolerance. Will still die if I let it sit for more than a...


Disconnect battery from vehicle overnight to check for internal battery drain.......just take one of the cables off.
If the battery is still up and starting the vehicle after being disconnected after a day or two......the drain IS in the vehicle and will have to be checked again.
Do it yourself.
Buy a cheap 12 volt test light.
Place it between the cable you removed before.
One end on the battery post and the other on the cable end.
Now....with the key off......
If the light glows brightly....you have TOO MUCH drain.
We want a dim glowing light.
The dim light is just the memory circuits in the electronics and OK.

With the doors closed....take out one fuse at a time until the light glows dim.......the fuse that dims the light is the problem circuit.
If no fuse dims the light...remove relays one at a time.
Remember....some fuses and relays could be in the engine compartment and under the dash.
If no relay dims the light disconnect ALL alternator wires.
Remember....anything that uses power will make the light glow ....keep those doors closed (we do not want interior light drain affecting the test ) and if you have a under hood light check it first by removing the bulb.
We do not want false readings.

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3 Answers

Battery keeps dying


Apparently the 03 wranglers have a tendency to have faulty fog light switches. It might be that your fog light switch is broken and they stay on all the time, and drain the battery. I just had this happen to me and realized after jumping it twice, that my fog lights won't turn off. Hope this helps

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2 Answers

Battery drained


Hi. lets isolate this drain. thsi will make it much easier to repair. use the procedure below.

Here is the procedure I use to isolate a battery drain. Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or "light" if there is a drain. If the "light or glow" is faint, that is probably normal draw for the clock or computer. If the "light or glow" is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. Remember to hold in the button in the door jam for the interior lights.

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1 Answer

My battery light is showing on the dashboard.So I replace the battery,alternator and starter.But the battery still on.I've gone thru two new batteries.Because the battery keeps on draining until its no...


Here is a procedure to isolate a battery drain I found elsewhere and has already proved very useful several times.

Remove negative battery cable from the battery. Using a 12-volt test light, hook one end to the negative battery post the other end to the negative battery cable you just disconnected. The test light will glow or “light” if there is a drain. If the “light or glow” is faint, that is probably normal draw for the clock or computer. If the “light or glow” is bright, then there is a large drain. That should be corrected. Now start removing and replacing the fuses one by one until the light goes out; that one will be the circuit with the drain. ***Remember to hold in the button in the door jam for the interior lights.***

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